I saw that, too. I had a story earlier this year with Mark Ledebuhr, who was attempting to devise such a system for a lower cost than the Raven. Richard
On Jun 5, 2014, at 11:15 AM, Deirdre Birmingham <deirdr...@gmail.com> wrote: > I have an Ag-Tec sprayer, and old 3002. I have not heard of the Raven > system, but wonder if this would apply to an older Ag-Tec model. > > Thanks, > Deirdre > > > On Thu, Jun 5, 2014 at 6:22 AM, Peter Werts <pwe...@ipminstitute.org> wrote: > Nick, > > You are correct. To maintain your target gallon per acre application of > water you need to consider adjustments to your travel-ground speed, gallon > per minute (GPM) flow rate from the nozzle tips and the tree-row width. > Changing your pressure will impact your droplet size and not do too much to > flow rates, i.e., it takes a four-fold increase in pressure to double nozzle > GPM. > > I have been working with other growers in Minnesota and Wisconsin on > calibration. I commonly find calibration to be significantly off where we > have variable tree size and row spacing. In 2012 we calibrated 30 different > scenarios on 12 sprayers and found over application by 52% and under > application by 20% to be very common. > > The Raven systems are very nice, especially if you have an AgTec. However > you still need to make sure your travel speed is calibrated. If your using a > high-pressure sprayer, the individual nozzle output should be within 5% of > the manufactures specified GPM at a specified pressure. > > There will be an IPM field day in northeast Iowa on June 20 where we will be > addressing calibration. I can send you more information, on this if you > like. I can also come out to your orchard and help you with this. > > Thanks, > > Peter > > > ============================= > Peter Werts > Project Coordinator > Specialty Crop IPM > IPM Institute of North America, Inc. > 4510 Regent St. > Madison WI 53705 > Office: 608 232-1410 > Cell: 612 518-0319 > Fax: 608 232-1440 > pwe...@ipminstitute.org > www.ipminstitute.org > > > On Jun 5, 2014, at 12:47 AM, Nick Lucking <n...@cannonvalleyorchard.com> > wrote: > > Hi everyone, > > Just curious as to how you guys with larger orchards spray blocks in your > orchards when some might be high density and others free standing. Do you do > a couple of calibrations with different gear/pressure settings or just do all > of one style block at a time? > > Cheers, > > Nick Lucking > Cannon Valley Orchard > Cannon Falls, MN > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop > > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop > > > > > -- > Deirdre Birmingham > The Cider Farm > www.TheCiderFarm.com > 608-219-4279 > 7258 Kelly Rd. > Mineral Point, WI 53565 > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop Richard Lehnert Associate Editor, Good Fruit Grower 11364 W. Willard Rd. Trufant MI 49347 616-984-5221 616-984-6001 Cell: 616-835-8121 richard.lehn...@gmail.com lehn...@goodfruit.com www.goodfruit.com
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